I remember an ad for the "It Takes Two" movie and how the whole audience was made out of twins. I then believed you need to have a twin to go see the movie.
A childhood belief about films

others believed things like this
- I used to think that a movie is made in realtime. I tought that a 2 hour movie is made in 2 hours.— Alexander
- when i was little i believed that when we watched a movie people had to act the movie all over a gen.
— Emmer - Thanks to the movie "Annie", I thought hot dogs were made from real dogs. — Katie
- When I was little I believed when an actor died in a movie, he died in real life.— Ben
- I used to believe that every person in the world had a twin, and that I had a long-lost twin in France.— Ashley
- I used to believe that EVERYTHING we did was being filmed for someone somewhere to watch as a movie— KatBird_27